Answer:
144 m²
Explanation:
You want to know the surface area of a square base pyramid with a side length of 6 m and a slant height of 9 m.
Surface area
The area of the given net is the sum of the areas of 4 congruent triangles and one square. The areas of these can be found using the relevant formulas.
SA = square area + 4 × triangle area
SA = 6² + 4 × 1/2(6)(9) = 36 +108
SA = 144 . . . . square meters
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Additional comment
The area of a square of side s is A = s².
The area of a triangle with base b and height h is A = 1/2bh.